Combined tube expander and cutter.



F. M. HAWKINS. COMBINED TUBE EXPANDBR ANDGUTTER.

APPLIOATIN FILED DEG. 11, 1907.

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1HE NaRRls PETERS co., WASHINGTON, D, c.

P. M. HAWKINS. COMBINED TUBE EXPANDBB AND CUTTER. APPLIUATION FILED 1330.11, 1907.

906,797. Patented- Dec; 15; '1908,

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Inventor @3Q/MM if THE Norms PETERS co., wAsmNcToN, u; c.

a Grunn,

I'. M. HAWKINS.

COMBINED TUBE EXPANDBR AND GUTTER. APPLICATION FILED DB0. 11, 1907.

906,797. Patented Dec. 15, 190s.

3 SHEETS-SHEET 3.

I 2o i? 3 THE NoRRls Pzrn'ns cu., WASHINGTON, n. c.

FRANK M. HAWKINS, OF` MANSFIELD, OHIO.

COMBINED A'TUBE EXPANDER AND CUTTER..

Specification of Letters Patent.

Application led December 11, 1907.

Y Patented Dec. 15, 1908.

Serial No. 405,993.

To all whom it may concern:

Be it known that I, FRANK M. HAwxINs, a citizen of the United States, residing at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in a Combined Tube Expander and Cutter,l of which the following is a specification:

My invention relates to a combined tube expander and roller and has for its object the construction of a device that can be used for the purpose of expanding or cutting off boiler tubes or the like.

One of the objects of my invention is to provide means whereby the mandrel can be revolved separately or together with the cylindrical head and the feed screw operated to expand the rollers or cutting disks through the medium of the mandrel in either case.

A further object of my invention is to provide means of forcing the cutting disks to expand for cutting purposes without changing the relative longitudinal cutting point of the disks.

Further objects of my improvement are to provide facilities for revolvin the tapered mandrel and expanding the rol ers for rolling purposes and means for operating the feed screw mounted on the same operating lever,

.means to lock the operating mechanism of the ratchet wheel out of mesh when desired and also means to lock the operating mechanism of the feed screw in operative posin tion.

A further object of my improvement is to provide means of operating the tube cutter and expander manually combined with means whereby the device can be operated through the medium of applied mechanical or other power preferably compressed air.

1n the accompanying drawin s; Figure 1 is a central longitudinal sectiona view of my device showing the cutters inserted ready for use as a tube cutter; Fig. 2 is a side elevation of my device (used as a tube cutter) inserted in a section of a tube or fiue and shows the cutters in operation. Fig. 3 is a side elevation of the cylindrical head of my device showing the driving slot and the apertures for the cutters and rollers. Fig. 4 showsl a side elevation of my device partly in section inserted in a section of a tube or Hue and used as a Hue-expander. Fig. 5 is a cross section of my device taken on the line a, a, of Fig. 2. Fig. 6 is a plan view of the operating lever and shows the pin and an ular slot used for throwing the pawl out o engagement with the ratchet. Fig. 7 is an end view of the shank of the taper arbor. Fig. 8 is a side elevation of the taper arbor showing the driving in inserted therein. Fig. 9 is a plan view o the ratchet wheel. Fig. 10 shows a plan view of the collar used for retaining the o erating lever in lace when the ratchet whee is removed to a low the application of other driving means. Fig. 11' is a perspective view of the annular collar attached to the end of the feeding pin. Fig. 12 is a perspective view of the annular cap used for lockin the feeding pin in engagementwith the feed screw. Figs. 13 and 14 are end and side elevations of the disk shoes showing the cutting disks mounted therein. Fig. 15 is a cross section of the head taken on the line B. B. of Fi 3. Fig. 16 is a side elevation of one of tie tube rollers. Fig. 17 is a sectional View of the feed pin locking mechanism and shows the position of the same when the feed pin is locked in engagement with the feed screw. Fig. 18 is an end view of the operating lever shown in Fig. 17. 19 is a detail vlew of the taper drlving pin. y

Referring to the drawings, reference numeral 1 represents a cylindrical head having one end internally screw-threaded and the opposite end provided with a series (preferably three) of recesses forming pocket bearin s 2' into which hardened steel tapered ro lers 3 are fitted and adapted to rotate therein as will be described hereinafter (see Fig. 4 and Fig. 16).

A feed screw 4 having a collar 5 formed on yone end with a series of circular or similar shaped apertures 6 formed in the periphery thereof is provided. The outer surface of the feed screw is screw-threaded and adapted to engage with the screw-threaded inner periphery 7 of the cylindrical head. The feed screw has an aperture formed in the center thereof into which the reduced straight portion 8 of a tapered mandrel 9 is rotatably journaled.

One extremity of the mandrel 9 is referably formed rectangular or its equiva ent to receive a wrench or other drivmg means.

An operating lever 10 is provided having an eye 11 formed on one end and rotatably mounted upon the straight portion of the mandrel and abutting against the face 12 of the collar 5 formed on the feed screw thereby leaving the feed screw interposed between the eye and the shoulder 12l formed on the tapered mandrel.

A ratchet wheel 13 having a counter bore 14 formed in one end (for a purpose hereinafter described) is 'rigidly secured to the straight portion of the mandrel adjacent to one end through the medium of the set screw 15 leaving the eye of the operating lever interposed between the outer face of the collar 5 and the inner face ofthe ratchet.

In the operation of rolling boiler tubes or the like, the feed-screw is threadably connected to the cylindrical head and the tapered mandrel is rotatably mounted within an aperture formed in the feed-screw. The rollers 3 are placed within the cylindrical head and are adapted to rest upon the tapered portion 9 of the mandrel and extend into. pocket bearings formed in the cylindrical head. When the feed-screw is turned to the right, the mandrel is carried forward forcing the rollers 3 to expand in cylindrical outline and contact with the inner periphery ofthe boiler tube or the like for the vpurpose of rolling the tube. When the rollers 3 are forced throu h themedium of the feed-screw and mandrel to their proper outline, the mandrel itself is rotated through the medium of the operating handle 10 and ratchet mechanism, as herein described.

Depending from and adjacent to the eye of the operating lever 10 outwardly extending winged portions 16 and 17 are provided. In the outer projecting portion 17, an aperture is provided to receive a pin 18, the outer end of which is connected to a collar 19 which is loosely fitted to the lever 10. The collar 19 is counter-bored on one end. A

in 20 is tted in a suitable aperture in the ever 10 and adapted to contact with the shoulder of the collar' to provide a stop for the collar 19.

A coil spring 21 is inter osed between the projecting portion 17 an the inner face of the collar 19 exerting its pressure or tension outwardly against the collar and normally keeping the pin 18 from engaging with the apertures 6 formed in the collar 5 of the feed screw when it is not desired to operate the feed screw for the purpose intended.

When it is desired to impart movement to the feed screw, pressure is exerted against the collar forcing the end of the pin to engage with the apertures 6 in the collar 5 and, when the lever 10 is rotated, movement is imparted t'o the feed screw for the purpose of expanding the cylindrical outline of the .rollers or disks.

In order to impartmovement tothe mandrel through the medium of the lever 10, a

pawl 22 is inserted in an aperture provided in the projecting or win ed portion 16 of the lever and normally vhel in mesh with the teeth of the ratchet wheel by means of a coil spring 23 which is inserted in the s ace (a) in the rear of the pawl and constantlojT exerts a pressure against therear end of the pawl whereby the pawl is made to normally engage with the teeth of the ratchet wheel 13. When the lever 10 is rotated, it rotates the mandrel 9 by the pawl and ratchet mechanism described.

A slot 24 is provided on the projecting vportion 16 leaving the body of the pawl 122 exposed. A pin 25 is fitted to an aperture provided in the pawl registering with the slot and adapted to move freely within the angular slot 24 and to contact with the wall 26 of the slot 24 which is formed to correspond with an inclined plane. When the pin is turned to the osition shown in Fig. 1 and Fig. 6 the paw is in engagement with the ratchet wheel and when the lever 10 is rotated it revolves the mandrel separately, or with the cylindrical head, when connected therewith. When the pin is forced in the position shown in Fig. 6 by dotted lines, the pawl is held out of engagement with the teeth of the ratchet wheel when the o era-ting lever 10 may be freely rotated for t e purpose of operatingthe feed screw in either direction independent of the tapered mandrel 9. This describes the mechanism usedfor the purpose of rolling tubesor the like.

A ca 27 is loosely mounted on the collar 19 and) is provided with an aperture 28 formed in the wall'29 of the cap 27 to receive the lever 10. A notch 30 is provided in the wall 29 to permit the cap to pass freely over the pin 20.

When it is desired to lock the pin 18 in engagement with the apertures 6 formed on the collar 5 of the yfeed screw 4, the collar 19 and cap 27 are forced forward until the outer surface of the cap 27 is in front of and contacting with the pin 20. The cap 27 is then rotated until the notch 30 is out of alinement with the pin 20.. The pin 2O will then be in contact with the outer surface of the cap 27 thereby holding the pin 18 in engagement with the apertures 6 until released. (See Figs. 17 and 18.) When the pin 18 is released from the apertures 6 formed on the feed screw, the ca p and collar are in the position shown in Fig. 1. It will be understood that the pin 18 is normally held out of enf therefrom into each of the slots. This pin is for the pur ose of preventing the separate Vrotation of t e mandrel when the cutting ,operation is being erformed. Attention is called to the fact t at the pin 33 is used only when the operator is performing the cutting operation. The purpose of the pin 33 is to connect the cylindrical head 1 and mandrel 9 together so that both can be rotated together when it is desired to cut off a tube rather than to expand the tube.

It is obvious that in a device constructed as shown it is necessary, when the cutting operation is being performed to revolve the cylindrical head and mandrel together. In the rolling operation, however, the mandrel is made to revolve independent of the cylindrical head by removing the pin 33.

Shoes 34 are provided having slots 35 formed at right angles to the body intov which cutting disks 36 are journaled. The shoes are fitted to the pocket bearings formed in the cylindrical head with the bottom of said shoes resting upon the tapered portion of the mandrel so that when the mandrel is moved longitudinally through the medium of the feed screw, the cutting disks, which are journaled in the shoes, are forced to expand or contract in cylindrical outline for the purpose intended.

The shoes 34 are provided with grooves 37 whichare adapted to fit the periphery of the tapered mandrel 9 when the said mandrel is in the position shown in Fig. 5 by full lines. The purpose of the grooves 37 is to cause the shoes 34' to aline themselves with the tapered arbor when pressure is exerted against the cutting disks.

When it is desired to cut the tubes or the like, movement is imparted to` the feed screw in the same `manner as described in the rolling process. When, however, it is desired to perform the cutting operation, 1 provide means to rotate the mandrel and cylindrical head together.

The pin 33 connects the mandrel and cylindrical head together so that when the pawl is permitted to mesh with the teeth of the ratchet wheel and movement is imparted to the operating lever, the mandrel and cylindrical head are made to revolve together. This permits thecutting operation to be performed without changing the relative longitudinal position of the disks and at the same time permits expansion of the cutters. The independent movement of the feed screw 4 permits the mandrel to be moved longitudinally for the purpose of expanding or contracting the cylindrical outline of the disks independent of the movement of the operating lever 10.

1f it is desired to operate the feed screw whether for the purpose of expanding or releasing .the cutting disks or the rollers, the

' pin 18 can be locked in engagement with the aperture 6 on the feed screw and the pawl 22 thrown out of engagementl with the ratchet wheel and the operation of feeding can be performed independent of the ratchet mechanism.

When it is desired to operate the tube expander or cutter through the medium of mechanical or other power, the ratchet wheel 13 is removed from the mandrel and the collar 33 is provided and fitted to the shank of the tapered mandrel and held against the eye of the operating lever .10 thus retaining the lever in its p ace. The end of the mandrel is connected to the operating mechanism through the medium of the rectangular or similar shape end 39.

The hereinbefore described counter-bore 14 in the ratchet wheel 13 is provided to permit the said ratchet wheel to be re laced in its position on the end of the man rel without removing the collar 38. Reference letter (c) represents a gage which is used for the purpose of gaging the length of the tube it is desired to cut off and the extent of the tube it is desired to expand.

Having fully described my invention, what 1 claim and desire to secure by Letters Patent is:

1. ln a tube roller and expander, comprising a cylindrical head having recesses formed on one end thereof for bearings and the o po site end internally screw-threaded, saidp cylindrical head having diametrically opposed slots formed therein, a feed screw adapted to engage with the screw threaded end of said head, a mandrel j ournaled in and supported by the feed screw, means to connect the mann drel to the head, a ratchet wheel secured to said r'mandreh an operating lever loosely journaled on one end of the mandrel and adapted to contact with the face of the feed screw, said operating lever having two outwardly projecting wing portions, one of said wing portions having a pawl fitted thereto and adapted to mesh with said ratchet wheel for rotating the mandrel separately or in conjunction with the cylindrical head.

2.` In atube roller and expander, the combination of a head having recesses formed in one end thereof for bearings with the opposite end internally screw-threaded, a feed screw adapted to engage with the screwthreaded end ofthe cylinder, a mandrel journaled in and supported by the feed-screw, an operating lever loosely ournaled 0n one end of the mandrel and adapted to engage with the feed screw, said operating lever having two outwardly projecting portions, a ratchet wheel secured to one end of the mandrel, one of said projecting ortions having a pawl fitted thereto and a apted to mesh with said ratchet wheel, means to hold said awl out of engagement with said ratchet w eel, a pin 'ournaled in the other projecting portion and adapted to mesh with aperturesmformed in the Vfeed screw whereby movement is 'imparted to said feed screw vwhen the operating handle is rotated.

' handle to rotate the mandrel independent or' the cylindrical head, means .to rotate the mandrel and thecylindrical head simultaneously, and also means on said operating handle to rotate the feed-screw as described and for the purpose set forth.

4. In a tube expander and cutter, comprising a' cylindrical head having bearings provided therein to receive cutting disks or rollers and also provided with diametrically opposed slots, a feed-screw connected to said cylindrical head, a mandrel ournaled in the hollow central portion of said feed-screw and adapted to be rotated therein independent of the rotation of the cylindrical head, a pin fitted to the mandrel and adapted to engage with said slots, means to rotate the mandrel and cylindrical head simultaneously or independent of each other.

5. In a tube expander and cutter comprising a cylindrical head having recesses formed on one end to receive cutting disks or rollers and kalso provided with diametrically opposed slots, a feed-screw thre'adably connected to -said cylindrical head having a hollow cening lever provided with winged portions loosely journaled on the straight portion oi said mandrel provided with winged portions,

means to expand the cylindrical outline of the rellersor cutting disks, means to rotate the tapered mandrel fand cylindrical headteg'ether, means to lock the operating mechanism of the mandrel in or out of operative p'osition, and also means to lock'the operating mechanism of' the feed-screw in or out of operative position substantially as and for the purpose described.

6. In a combined tube expander and cutter, the combination oi' a cylindrical head having a series of pockets formed in one end, rollers adjustably carried by the pockets a feed-screw threadably connected to the opposite end; of a mandrel rotatably mounted in said feed-screw, said cylindrical head being provided with ldiametrically opposed slots extending to the periphery thereof, remov able means mounted on said mandrel and adapted to engage with said slots to revolve the cylindrical head with the tapered mandrel as and for the purpose described.

7. The combination of a tube expander and cutter comprising a cylindrical head having one or more pockets formed therein adapted to receive rollers or shoes having rollers or cutters journaled therein, means to revolve the mandrel independent of the cylindrical head for rolling purposes, removable means mounted on saidrmandrel and adapted to engage with slots formed in the cylindrical head to rotate it simultaneously with the mandrel for cutting purposes.

8. The combination of a tube expander and roller comprising a 'cylindrical head, said cylindrical head being provided with a series of pockets, rollers fitted to said pockets, shoes also adapted to iit said pockets, rotary cutters mounted in said shoes, a feed-screw ntted tosaid cylindrical head, a mandrel rotatably mounted in said feed-screw, said mandrel being adapted to expand the cylindrical outline formed by the cutters and rollers as and for the purpose described.

In testimony whereof l aliix my signature in presence of two witnesses.

FRANK M. HAVKINS.

Witnesses:

JOHN H. Goss, PEARL ACKERMAN. 

